Liquid tank



FIG. 1 is a front perspective view of a liquid tank showing my newdesign;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a right perspective view thereof with the left side a mirrorimage;

FIG. 4 is a top perspective of the base portion thereof; and,

FIG. 5 is a front perspective view of the base.

CLAIM The ornamental design for a liquid tank, as shown and described. 